Section 5.1 Classifying Rocks

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Vocabulary

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Texture: to geologists it is like the feel of the rock's surface

Grains: a kind of minerals rocks that made up a rock

Igneous rock: Forms form the cooling of molten rock-either magma below the surface or lava at the surface

Sedimentary rock: forms when particles of other rocks or the remain of plants and animals are pressed and cemented together

Metamorphic rock: forms when an existing rock is changed by heat ,pressure or chemical reactions

Outline

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How geologists Classify Rock

• Texture
  • Grain Size
  • Grain Shape
  • Grain Pattern
  • No Visible Grain
• Mineral Composition

Origin

• Igneous rock
• Sedimentary rock
• metamorphic rock